Plural socket.



P. E. SHELBY.

PLURAL SOCKET.

APPLICATION FILED NOV. 21, 1912.

1 ,107, 120. Patented Aug. 11, 1914 I pull switch;

same with the casing removed; Fig. 3 is a .lUNITED STATES FRANK E. SEELEY, OF BRIDGEPOR-T,

PATENT OFFICE.

CONNECTICUT, ASSIGNOR TO THE BRYANT ELEC- NECTICUT.

PLURAL SOCKET.

Specification of Letters Patent.

Patented Au 11, 1914.

Application filed November 521, i912. Serial No. 732,712.

To all whom it may concern Be it known that I, FRANK E. SEELEY, a citizen of the United States of America, and residing at Bridgeport, in the county of Fair-field andnState of Connecticut, have in vented a certain new and useful Improvement in PluralSockets, of which the following is a specification.

My invention relates to plural sockets and particularly to twin sockets, the object of my invention being to provide an improved device of this character provided with a switch mechanism by means of which the circuits of the several sockets in the fitting may be controlled.

In the accompanying drawing in which my invention is illustratively embodied, l igure 1 is a side elevation of a twin socket mounted on a pipe end and provided with a Fig. 2 is a plan View of the taco view of one of the insulating buttons with some of the metal parts attached; Fig. l is a similar view of the other insulating button; Figs. 5 and (i are cross sections showing the switched center contacts for the two lamp sockets; Fig. 7 is a cross section showing the connection from one of the wire ter- 'ininals to the switch snindle and rotary switch clement; Fig. 8 is perspective of the rotary switch element; and Fig. 9 is a side elevation showing a combined twin socketand atlachn'ient plug in which my invention is en'ihodied; Fig. 1.0 is a more or less diagrammatic plan of the button A as in Fig. 3, to show the relative positions of the switch piece 28 with relation to the terminals 33 and 37.

The present invention in the torm'shown, comprises a twin socket having a casing comprising separable ends 10 and 11 sleeved together over the switch mechanism and lamp terminals and united by means of co operating latching elements 12 and 13 in well understood manner. Upon one end of the casing a boss 14 is formed which is provided with a threaded nipple 15, by means oi which the fitting may be mounted upon the threaded end of a wire conduit 16 or the likev Within the casing are housed insulating buttons A and B, on the outer faces of which are mounted the lamp-receiving shells l7 and 18. Between the opposed faces of the buttons and B which are spaced apart by standards 19 and 20, threaded to receive the binding screws 2-1, 22, the switch mechanism hereinafter described is mounted. A third spacing member 23 carries a bell 24: through which the switch operating chain 25 is guided out of the casing.

The particular switch mechanism employed to control the lamp socket circuits is immaterial. As here shown both of the socket shells l7 and 18 are constantly in the switch circuit,by reason of their direct connection to thestandard 20. The center contacts 2(5 and 27 are brought into the circuit through a rotary switch member 28 which takes its current from its hearing bushing 29, the latter in turn-receiving the current from the standard 19 through the angled lug 30 of the latter. The center ;contaet 26, cooperating with the shell -17, to form one socket, is electrically connected through a screwbolt 31. with an angled terminal 32 which carries a spring contact piece 33 lying aga inst the periphery of the ratchet 3% over which the contact wings of the rotary switch member 28 are angled. The center contact 27, cooperating with the shell 18 to form the other lamp socket, is connected through a bolt 35 to the spring terminal 36 which likewise earries a spring contact piece 37 bearing against the periphery of the ratchet member 34 at a point substantially 90 from contact element center contact 26.

As noted in Fig. 7 the rotary switch element 28 comprises a central with stud-bearing 38 with contact wings 39 spaced 90 apart and in assembled condition overlying two adjacent teeth of the tour toothed ratchet block 3 of ii'isulat-ing material. Consequently upon the rotation of the latter, the current conducted through the rotary contact 28 is distributed first to the terminal 26, and then simultaneously to both tern'iinal. 26 and 27, and thirdly, to center contact 27 alone, and linallv breaks the connection altogether" so that both lamps are out of tl'iecircuit. It is thus possible to have either lamp alone, or both lamps simultaneouslyligl1ted,as1'nay be desired. To operate the rotary i intact 28, I provide a disk it), the ilowu-slruck lugs 4-1 of which engage in one face of the insulating block 3i. A central spindle -l-2 fast with the disk l-l) projects from its opposite Face and is journaled in the socket. (if the springadjusting abutment 51. iatchet teeth d3 33 of the terminal for the disk portion two peripheral the spindle 4.2 and carrying achain rail 46 are pressed out Irom LUIS face of the disk to engage cooperating pawl teeth a l formed on the disk 45, the latter being o'urnaled on respectively sleeved over said insulating buttons and the lamp terminals thereon, latching means for engaging the adjacent ends of said. shells together, a bell mouth outlet through saidv casing for a flexible pull member for operatin,= the switch and a threaded nipple projecting from said casing for securing the fitting to a fixture, substantially as described.

of any suitable type. A coil spring t? presses the pawl disk into engagement with the ratchet disk 40, while the engage ment between the extended end 48 of the sprint and the tongue 49, stiuck from the ratchet plate, serves to return the latter to initial position after actuation by the pull body element, oppositely faced lamp chain. The other end of the spring is ensockets arranged in, substantial al1ne gaged by one or the other of the lugs 50 ment on said insulating body, a. pull formed on the abutment 51, by the rotarial adjustment of which the tension of the spring may be varied.

It is obviously possible the switch mechanism to the lamp circuits but to mount the switched sockets upon an attachment plug, as sup;- gested in Patent 1,010,98et, granted to me jointly with George 1). Thomas, and I do not limit myself to the precise details of the construetion shown, but

I claim as my invention 1.. A twin socket having a pair of insulating buttons spaced apart, lamp terminals on the outer faces of said buttons and a pull switch mounted between the opposed faces of said buttons, in combination with an in closing easing comprising independent-shells switch carried by said insulating body and electrically interposed between said lamp sockets, in e mibination with an inelosing .easiny; com iirisingindependent shells sleeved over said body and sockets, latching ends of said shells together, an outlet through the casing for a flexible pull 111cm her for operating the switch and an outwardly projerting threaded element for securing the fitting; to a fixture.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses.

FRANK E. SEELEY.

to not only vary di'lferently control Witnesses:

C. 19'. Burrow, EVERETT L. Rooms.

2'. A twin socket having an insulating means for engaging the adjacent 

